Viewing archive of Sunday, 18 October 2015 - Sunspot regions

It appears that the image of the visible solar disk for this day in history is missing.
Sunspot number New regionsBackground fluxMaximum fluxC
81 -21B7.29C2.73

Sunspot regions

Region 12431

Number of
sunspots
Size Class Magn. Class Spot Location
3 2 20 CSO S18W19
HMIIF
HMIBC

Region 12432

Number of
sunspots
Size Class Magn. Class Spot Location
3 -1 10 BXO S21W38
HMIIF
HMIBC

Region 12434

Number of
sunspots
Size Class Magn. Class Spot Location
20 -2 260 110 DKI S10E20
HMIIF
HMIBC

Region 12435

Number of
sunspots
Size Class Magn. Class Spot Location
1 30 10 HAX S15E60
HMIIF
HMIBC

Region 12436

Number of
sunspots
Size Class Magn. Class Spot Location
6 80 DAI N09E71
HMIIF
HMIBC

Solar flares on this day

C2.15 C1.93

All times in UTC

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Last X-flare2025/12/01X1.9
Last M-flare2025/12/06M8.1
Last geomagnetic storm2025/12/04Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 202591.8 -22.8
December 2025167.7 +75.9
Last 30 days107.1 +13.7

This day in history*

Solar flares
12024M3.2
22006M2.97
32024M2.3
42013M1.82
51999M1.46
DstG
11982-78G2
22022-63G1
31959-60
41960-60G2
51993-57G1
*since 1994

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